CN203670336U

CN203670336U - Prefill valve

Info

Publication number: CN203670336U
Application number: CN201420023407.1U
Authority: CN
Inventors: 潘昌颖
Original assignee: WUXI HUAYU PRECISION MACHINE CO Ltd
Current assignee: WUXI HUAYU PRECISION MACHINE CO Ltd
Priority date: 2014-01-15
Filing date: 2014-01-15
Publication date: 2014-06-25
Anticipated expiration: 2024-01-15

Abstract

The utility model provides a prefill valve. The prefill valve comprises a body and a switch valve core oil cylinder body connected with the body, the body is provided with a high pressure side oil port and a low pressure side oil port communicated with the high pressure side oil port, and a switch valve core which can slide in the axial direction and is hollow is arranged in an inner cavity of the body and an inner cavity of the switch valve core oil cylinder body. A spring is arranged in an inner cavity of the switch valve core, the upper end of the switch valve core is tightly attached to the body under the action of the spring so that the high pressure side oil port and the low pressure side oil port can be obstructed, the inner cavity of the switch valve core oil cylinder body is divided into two chambers through the lower end of the switch valve core, the upper chamber is provided with a valve core oil port, and the lower chamber is provided with a punching oil port. The upper end of the inner cavity of the switch valve core is communicated with the high pressure side oil port through a small hole, and the lower side of the inner cavity of the switch valve core is communicated with the lower chamber of the switch valve core oil cylinder body. According to the prefill valve, the valve core is pushed and controlled through pressure oil; compared with an existing prefill valve provided with a push rod, the oil flow quantity and the oil flow area are increased greatly. Besides, the prefill valve is provided with a pressure relief device, no extra pressure relieve valve is needed, and cost for parts is lowered.

Description

A kind of liquid-filling valve

Technical field

The utility model relates to hydraulic pressure installation field, specifically a kind of liquid-filling valve.

Background technique

Existing liquid-filling valve only has the function of switch hydraulic fluid port, push valve body open and be by an oil cylinder by push rod from top, bottom.The much middle push rod of oilhole, made the long-pending minimizing of pasta, and oily throughput also reduces relatively.And, close pressurization at liquid-filling valve and keep, after pressure, in the time will reducing pressure, must doing pressure release with an other oily Decompression valves again, increase cost of parts.

Model utility content

The utility model, in order to overcome the defect of prior art, provides a kind of large flow to carry the liquid-filling valve of decompression function.

The utility model comprises the body and the switch valve core oil cylinder body that link together, has the high pressure side hydraulic fluid port and the low voltage side hydraulic fluid port that communicate on body, in body and switch valve core oil inner chamber of cylinder block, is provided with and can slides axially, and inside is hollow switch spool.

Switch valve core inner cavity is equipped with spring, body is close in switch spool upper end under spring action intercepts high pressure side hydraulic fluid port and low voltage side hydraulic fluid port, switch valve core oil inner chamber of cylinder block is divided into two chambers by switch spool lower end, and upper chamber has out spool hydraulic fluid port, and lower chambers has punching press hydraulic fluid port.

Switch valve core inner cavity upper end communicates with high pressure side hydraulic fluid port by aperture, and cavity below is communicated with switch valve core oil cylinder body lower chambers.

Further improve, switch valve core oil cylinder body lower chambers has metapore, and metapore is connected with pressure relief device.

Further improve, described pressure relief device comprises pressurize spool and plunger tip, and wherein, pressurize spool holds out against switch valve core oil cylinder body metapore, on pressurize spool, have and the oil drainage hole being communicated with low voltage side hydraulic fluid port, oil drainage hole opens or closes under the plunger tip effect being connected with pressurize spool;

Further improve, described pressurize spool overcoat has pressurize cover, and top heart overcoat has pressure releasing valve core, and pressure releasing valve core overcoat has cover plate, has pressure release hydraulic fluid port on cover plate, promotes pressure releasing valve core and the motion of the top heart by pressure oil.

The utility model beneficial effect is:

1, because control spool promotes by pressure oil, avoided stopping of push rod, compared with existing liquid-filling valve, crossed oil mass and cross the long-pending increase greatly of pasta.

2, carry pressure relief device, do not need to use extra Decompression valves, reduced cost of parts.

Accompanying drawing explanation

Structural representation when Fig. 1 is the utility model pressurization.

Structural representation when Fig. 2 is the utility model pressure release.

Embodiment

Below in conjunction with accompanying drawing, the utility model is described in further detail.

The utility model comprises the body 1 and the switch valve core oil cylinder body 8 that link together, on body 1, have the high pressure side hydraulic fluid port 10 and the low voltage side hydraulic fluid port 11 that communicate, it is characterized in that: in body 1 and switch valve core oil cylinder body 8 inner chambers, be provided with and can slide axially, inside is hollow switch spool 4.

Switch spool 4 internal cavities are equipped with spring 2, body 1 is close in switch spool 4 upper ends under spring 2 effects intercepts high pressure side hydraulic fluid port 10 and low voltage side hydraulic fluid port 11, switch valve core oil cylinder body 8 inner chambers are divided into two chambers by switch spool 4 lower ends, upper chamber has out spool hydraulic fluid port 12, and lower chambers has punching press hydraulic fluid port 13.

Switch spool 4 internal cavities upper ends communicate with high pressure side hydraulic fluid port 10 by aperture, and cavity below is communicated with switch valve core oil cylinder body 8 lower chambers.

Switch valve core oil cylinder body 8 lower chambers have metapore, and pressurize spool 9 holds out against metapore, have and the oil drainage hole 15 being communicated with low voltage side hydraulic fluid port 11 on pressurize spool 9, and oil drainage hole 15 opens or closes under plunger tip 3 effects that are connected with pressurize spool 9.Pressurize spool 9 overcoats have pressurize cover 6, and the heart 3 overcoats in top have pressure releasing valve core 7, and pressure releasing valve core 7 overcoats have cover plate 5, have pressure release hydraulic fluid port 14 on cover plate 5, promote pressure releasing valve core 7 and the top heart 3 moves by pressure oil.

Working procedure of the present utility model is:

1) usually time, switch spool 4 is fitted and is compressed by spring 2 with body 1, and high pressure side hydraulic fluid port 10 does not communicate with low voltage side hydraulic fluid port 11.

2), while pressurization, switch valve core oil cylinder body 8 is arrived in 13 oil-feeds of pressurising hydraulic fluid port, pressure oil clamping switch spool 4 and pressurize spool 9, and flow into high pressure hydraulic fluid port 10 from the middle aperture of switch spool 4, oil cylinder is pressurizeed.

3) when pressure release, open spool hydraulic fluid port 12 and enter pressure oil with pressure release hydraulic fluid port 14 simultaneously, because pressure releasing valve core 7 areas are large, push away the front drive top heart 3, the top heart 3 backs down pressure releasing valve core 7, and the oil drainage hole 15 of the pressure oil in switch valve core oil cylinder body 8 from pressurize spool 9 enters low voltage side hydraulic fluid port; After pressure unloads, switch spool 4 separates with main body 1 because opening the 12 oil pressure effects of spool hydraulic fluid port, and high pressure side hydraulic fluid port 10 communicates with low voltage side hydraulic fluid port 11, and hydraulic oil can free-flow.

The concrete application approach of the utility model is a lot; the above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; do not departing under the prerequisite of the utility model principle; can also make some improvement, these improve and also should be considered as protection domain of the present utility model.

Claims

1. a liquid-filling valve, comprise the body (1) and the switch valve core oil cylinder body (8) that link together, on body (1), have the high pressure side hydraulic fluid port (10) and the low voltage side hydraulic fluid port (11) that communicate, it is characterized in that: in body (1) and switch valve core oil cylinder body (8) inner chamber, be provided with and can slide axially, inside is hollow switch spool (4);

Switch spool (4) internal cavities is equipped with spring (2), body (1) is close in switch spool (4) upper end under spring (2) effect intercepts high pressure side hydraulic fluid port (10) and low voltage side hydraulic fluid port (11), switch valve core oil cylinder body (8) inner chamber is divided into two chambers by switch spool (4) lower end, upper chamber has out spool hydraulic fluid port (12), and lower chambers has punching press hydraulic fluid port (13);

Switch spool (4) internal cavities upper end communicates with high pressure side hydraulic fluid port (10) by aperture, and cavity below is communicated with switch valve core oil cylinder body (8) lower chambers.

2. liquid-filling valve according to claim 1, is characterized in that: switch valve core oil cylinder body (8) lower chambers has metapore, and metapore is connected with pressure relief device.

3. liquid-filling valve according to claim 2, it is characterized in that: described pressure relief device comprises pressurize spool (9) and plunger tip, wherein, pressurize spool (9) holds out against switch valve core oil cylinder body (8) metapore, on pressurize spool (9), have and the oil drainage hole (15) being communicated with low voltage side hydraulic fluid port (11), oil drainage hole (15) opens or closes under plunger tip (3) effect being connected with pressurize spool (9).

4. liquid-filling valve according to claim 3, it is characterized in that: described pressurize spool (9) overcoat has pressurize cover (6), the top heart (3) overcoat has pressure releasing valve core (7), pressure releasing valve core (7) overcoat has cover plate (5), on cover plate (5), have pressure release hydraulic fluid port (14), promote pressure releasing valve core (7) and the top heart (3) motion by pressure oil.